We had a vendor deliver some C# source code that was exactly this. A 'repository' interface that had a concrete class that called an abstract data access class etc. A path of 3 or 4 calls to run a SQL statement against a MSSQL Server. There were no requirement for this.

The Gang Of Four design patterns are great when you actually use them to solve the problem they were designed for. I worked on a product that grew in complexity and a factory was needed. Implementing was easy in Netbeans - right click and extract interface and provide the new implementations and the creation logic.

I'm not sure when using patterns all the time got so prevalent. As the saying goes, when all you have is a hammer, everything looks like a nail.